I bought it for packing exchange at service when I asked for maintenance at customer's house, but I think that I did not use it because I mistook the size I ordered. But, it is cheap. I will be careful not to mistake the size the next time.

I think that this product is quite normal, I would like to ask you to make the inside diameter a little smaller and thicker. Sometimes packing seeped inside and water leakage occurred. It means that it got inside by tightening.